In short, the automatic transmission in a 2007 Buick LaCrosse generally requires about 11 quarts for a full refill, while a standard drain-and-fill service typically uses around 7–8 quarts. Dexron VI is the recommended fluid for this transmission.
The LaCrosse of this era commonly uses GM's 4T65-E automatic transmission. Exact fluid quantities can vary slightly depending on the specific model, whether a new filter is installed, and whether the torque converter is drained during service. Always check the owner's manual or GM service literature for VIN-specific guidance.
Transmission type and capacity
The LaCrosse lineup from 2007 most often pairs with the 4T65-E automatic transmission. GM specifies a total system capacity of roughly 11 quarts for a complete refill. This figure serves as a baseline for planning a service.
Fluid type and service notes
Dexron VI is the recommended specification for GM automatics of this vintage. Using older Dexron III fluid is not advised. If you replace the transmission filter or perform a more thorough service (such as a bulk flush), the amount of fluid required will trend toward the full-capacity figure.
Capacity at a glance
Below are the commonly cited quantities you may encounter during service.
- Full capacity (complete fill): about 11 quarts of Dexron VI.
- Drain-and-fill service (pan drain and refill, no converter flush): typically about 7–8 quarts.
Note: The exact amount can vary by vehicle condition, transmission variant, and whether the pan gasket or filter is replaced during service. Checking the vehicle’s manual or consulting a GM dealership will provide VIN-specific guidance.
Summary
The 2007 Buick LaCrosse automatic transmission generally holds around 11 quarts when fully filled, with a standard drain-and-fill using about 7–8 quarts of Dexron VI. Always verify with the owner's manual or a service bulletin for your particular configuration.